Megawatt-stage direct-drive internal rotor permanent-magnetic wind power generator set

Abstract

The invention discloses a megawatt-stage direct-drive internal rotor permanent-magnetic wind power generator set which comprises a wind wheel, a paddle-distance changing system, a permanent-magnetic generator, an engine room, an engine base and a yawing system, wherein the permanent-magnetic generator comprises a casing, a stator, a front end lid, a rotor, a back end lid and a rotor rotation support mechanism, the rotor rotation support mechanism comprises a movable shaft, a bearing I, a fixed shaft and a bearing II, the movable shaft and the fixed shaft are hollow, the movable shaft is sheathed outside the fixed shaft, one end between the movable shaft and the fixed shaft is provided with the bearing I, and the other end is provided with the bearing II. The rotor is fixed on the movable shaft, the movable shaft is connected with the wind wheel, and the fixed shaft is connected with the engine room and the engine base. The hollow fixed shaft can provide a passage from the engine room and the engine base to a wheel hub for equipment maintenance personnel and ensures the human safety. The bearing has low bearing capacity, and the end lid of the bearing side of the generator and the fixed shaft are simultaneously connected with the engine room and the engine base to achieve the aim that the end lid bears the stator load of the generator and the fixed shaft bears the load of the rotor and the wind wheel.

Description

technical field [0001] The invention relates to a wind power generator set, in particular to a megawatt-level direct-drive inner rotor permanent magnet wind power generator set. Background technique [0002] In wind turbines, the direct-drive generator structure is called direct-drive wind turbine, but the direct-drive wind turbine is a new technology product developed in recent years. System components, improve the reliability and power generation efficiency of wind turbines, and reduce the noise of wind turbines. A full power converter is used between the generator and the grid. Suitable for power grid fault operation capability. [0003] At present, there are direct-drive outer rotor wind turbines in the domestic and foreign markets, direct-drive inner rotors with single-bearing wind turbines, and direct-drive double-bearing solid-shaft wind turbines. [0004] There are different levels of deficiencies in the above-mentioned direct-drive wind turbines. For example, di...

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Problems solved by technology

Another example is that the double-bearing supported solid-core shaft direct drive generator has poor ventilation and heat dissipation, and it needs to pass outside the generator from the engine room to the hub, which poses a safety hazard.

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